Founded in 1976 with Protozyme, described as the first enzymatic detergent for surgical instruments, Ruhof Corporation manufactures cleaning and reprocessing solutions for surgical instruments and endoscopes. From its North Shore of Long Island base, the company has expanded its research-driven line to include products such as Endozime Bio-Clean and the CleanRead contamination-monitoring system. Ruhof operates ISO 13485- and ISO 14001-certified facilities and serves healthcare customers globally.
ISO 13485
ISO 14001
CE Mark
Compliance program
ISO 15883 Annex F
Compliance program
CE
Quality certification
Roboz Surgical Instrument Co., IncFounded by Otto Roboz in 1953, Roboz Surgical Instrument Co. designs and supplies hand-finished surgical instruments and related equipment for biomedical and life-science research. Its catalog now spans more than 1,000 products, including fine micro-dissecting tools and Genuine Dumont forceps, used by healthcare and research professionals worldwide. Roboz also provides instrument care services such as color coding, extending a research-instrument specialty that has lasted more than six decades.GAITHERSBURG, MD
Wassenburg MedicalFounded in 1984 by Gerrit Wassenburg, Wassenburg Medical develops and manufactures automated endoscope reprocessing systems for the safe cleaning and disinfection of flexible endoscopes. The business grew from a family company into a specialist represented in 35 countries, and its end-to-end approach extends from reprocessing equipment to traceability and supporting services. Its development and manufacturing organisation is ISO 13485 certified, with WASSENBURG® washer-disinfectors tested against ISO 15883 requirements.IVYLAND, PA
Propper Manufacturing Company, IncFamily-owned since its founding in 1945, Propper Manufacturing Company is a Long Island City medical-device maker known for helping healthcare professionals verify that sterilization processes have worked. Its U.S.-made products and biological monitoring service support clinical and non-clinical customers, while its OEM work adapts medical devices to the requirements of partner brands. Propper is ISO 13485:2016 certified and recently received FDA clearance for its EO Chex indicator tape.LONG ISLAND CITY, NY
Alconox, LLCFounded in 1946 after Louis Zisman developed a residue-free glassware cleaner, Alconox, LLC makes American-made detergents for the critical cleaning needs of scientists and engineers. For more than 75 years, it was owned and operated by its founding families, and its products are now distributed in more than 50 countries with technical support for cleaning methods, custom blends and private-label detergents. Alconox is ISO 9001:2015 and ISO 13485:2016 certified and joined TCP Analytical in 2025.WHITE PLAINS, NY